Adjustable holder



FIG. 1 is a front view of an adjustable holder showing my present design;

FIG. 2 is a rear view thereof;

FIG. 3 is a left view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a top side view thereof;

FIG. 6 is a bottom view thereof; and,

FIG. 7 is a perspective view thereof. 

CLAIM The ornamental design for an adjustable holder, as shown and described. 